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Finding the Fourth Proportional to 186.33, 279.53 and 128.01

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Solution

The fourth proportional to 186.33, 279.53 and 128.01 is: 192.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.33 : 279.53 = 128.01 : x
  2. Step 2: Convert to fraction form
    186.33/279.53 = 128.01/x
  3. Step 3: Cross multiply
    186.33x = 279.53 × 128.01
  4. Step 4: Simplify right side
    186.33x = 35,782.64
  5. Step 5: Solve for x
    x = 35,782.64/186.33
  6. Step 6: Final answer
    x = 192.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.